If the charges attracting each other in the preceding problem have equal magnitudes, show that the magnitude of each charge is 2.8

The magnitude of each charge is

Explanation:

Suppose the two point charges are separated by 6 cm. The attractive force between them is 20 N.

We need to calculate the magnitude of each charge

Using formula of force

Where, q = charge

r = separation

Put the value into the formula

Hence, The magnitude of each charge is

it has to be b, about 97 percent.